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Wingfield divides tuberculosis into its various phases of development from the time the tuberculin test first becomes positive to the advanced stage of the disease. The various steps are illustrated graphically in one large chart. He states that the student in medical school "learns next to nothing about his main tasks, namely, the detection of the disease in its treatable stages and the supervision of his successfully treated cases." As "present-day teaching and present-day textbooks show him the moderately advanced case during its symptom-producing active stage and almost totally ignore the vitally important earlier half of the development of the disease both in its clinical and pathological aspects," the book was prepared to provide a comprehensive and logical picture of the pathogenesis of chronic pulmonary tuberculosis, as well as the methods of treatment appropriate for each stage of the disease. Attention is called to the fact that our knowledge of
Pulmonary Tuberculosis in Practice: A Modern Conception. JAMA. 1938;110(21):1777. doi:10.1001/jama.1938.02790210057027